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Table 3.

Quantitative analysis results of the proposed approach against state-of-the-art methods on the database DB_syn for case study CS₁ and CS₂.

		Proposed	Ravì et al. (2018)	Villena et al. (2013)	Wiener	Contrast-enhancement
CS₁	$S S I M_{\hat{H R}}$	0.90  ±  0.03	0.93  ±  0.03	0.89  ±  0.05	0.88  ±  0.06	0.66  ±  0.08
	$▵ GC F_{\hat{HR}}$	0.60  ±  0.22	0.45  ±  0.25	0.13  ±  0.11	−0.21  ±  0.21	1.03  ±  0.32
	$▵ GC F_{I^{LR}}$	0.47  ±  0.26	0.32  ±  0.32	0.00  ±  0.00	−0.34  ±  0.19	0.90  ±  0.26
	Tot_cs	0.68	0.68	0.54	0.43	0.50
CS₂	$S S I M_{\hat{H R}}$	0.91  ±  0.03	v0.92  ±  0.03	0.90  ±  0.04	0.89  ±  0.06	0.65  ±  0.07
	$▵ GC F_{\hat{HR}}$	0.50  ±  0.25	0.52  ±  0.20	0.11  ±  0.05	−0.28  ±  0.22	1.08  ±  0.20
	$▵ GC F_{I^{LR}}$	0.39  ±  0.23	0.41  ±  0.23	−0.00  ±  0.00	−0.38  ±  0.21	0.97  ±  0.18
	Tot_cs	0.66	0.68	0.54	0.42	0.50